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https://issues.apache.org/jira/browse/YARN-8792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16802707#comment-16802707
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Wilfred Spiegelenburg commented on YARN-8792:
---------------------------------------------
None of these changes fit into the integrated way we currently implement the
rules in the FS and CS.
As part of YARN-8948, YARN-9298 and finally integrated in YARN-8967 this has
been changed. Both schedulers now use the same placement manager and placement
rule code. The placement of the application in a queue is moved out of the FS
also.
> Revisit FairScheduler QueuePlacementPolicy
> -------------------------------------------
>
> Key: YARN-8792
> URL: https://issues.apache.org/jira/browse/YARN-8792
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Affects Versions: 3.1.1
> Reporter: Shuai Zhang
> Assignee: Shuai Zhang
> Priority: Major
>
> Fair scheduler use `QueuePlacementPolicy` to map a request to queue. There
> are several problems:
> # The termination of the responsibility chain should bind to the assigning
> result instead of the rule.
> # It should provide a reason when rejecting a request.
> # Still need more useful rules:
> ## RejectNonLeafQueue
> ## RejectDefaultQueue
> ## RejectUsers
> ## RejectQueues
> ## DefaultByUser
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